Hi maccallum242,
I have a tablet with the same make and model. I'm using a SAMSUNG SD Card for it. Maybe your SD card is not compatible or it just needs to be unplugged then plug. Also, just to verify, do you want to change the download path of the files you're downloading?
This doesn't work for chrome but you can use the basic internet browser installed in the tablet. Just open the INTERNET Browser then go to MORE >SETTINGS> ADVANCED>DEFAULT STORAGE should be SD Card.
Hope this helps!
